The pro-marijuana advocacy group has a video billboard promoting marijuana as an alcohol alternative. That ad — which boasts “Marijuana: Less harmful than alcohol and time to treat it that way" — is being shown outside the grounds of Indianapolis Motor Speedway the next three days as the NASCAR Sprint Cup Series takes to the track for Sunday’s Brickyard 400.

“We hope racing fans who support marijuana prohibition will question the logic of punishing adults simply for using a product that is safer than those produced by sponsors of NASCAR events and teams that race in them,” said Mason Tvert, director of communications for the Marijuana Policy Project.

The video billboard was scheduled to run through the race weekend but was pulled Friday by billboard owner Grazie Media after pressure from an anti-drug group, according to the Marijuana Policy Project.

Marijuana is illegal in Indiana, and the Marijuana Policy Project says Indiana has some of the harshest marijuana penalties in the country. Possession of even a single joint is punishable by up to a year of incarceration and up to a $5,000 fine.

NASCAR and track officials weren't exactly welcoming the ads on the brink of one of the sport’s biggest events—the Brickyard 400, whose title sponsor this year is Crown Royal.

IMS issued a statement distancing it from the advertising.

“The electronic advertising billboard featuring a video from the Marijuana Policy Project is not affiliated or associated with the Indianapolis Motor Speedway,” the statement said. “The billboard is not located on speedway property or on any property over which IMS has control.”

NASCAR Vice President and Chief Communications Officer Brett Jewkes said because the billboard was outside the track grounds, NASCAR had no control over it and would not comment.

NASCAR’s sanction agreements, according to its sanction with Dover International Speedway, indicates that NASCAR could forbid a track from such sponsorship.

“NASCAR reserves the right to approve or disapprove any advertising, sponsorship or similar agreement in connection with the event,” states the standard NASCAR sanction agreement.